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Apple IIgs System Timing and the FPI

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Apple IIgs System Timing and the FPI


Published July 22, 2011


The Apple IIgs has a split personality. Most of the machine runs at a ~1MHz clock rate, keeping compatibility with earlier Apple IIs. Some components, however, can be decoupled and run at a faster rate. The FPI, or Fast Processor Interface, is the chip responsible for coordinating the interactions between these personalities. In this KansasFest 2011 session, Daniel "Krue" Kruszyna includes a high level overview of the FPI's responsibilities, along with a detailed look at some particular cases, using signal measurements obtained from a real Apple IIgs.


Run time 62 minutes 19 seconds
Producer Daniel Kruszyna
Audio/Visual sound, color
Language English

Credits

videographer: Ken Gagne

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